Liquid crystal display device and image display method thereof

A liquid crystal display device and image display technology, applied to static indicators, instruments, etc., can solve the problems of reducing power consumption and being unable to adopt, and achieve the effects of reducing power consumption, improving quality, and suppressing the deviation of brightness or color tone

Inactive Publication Date: 2008-11-12
VICTOR CO OF JAPAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the structure described in the above-mentioned non-patent document 1 cannot be adopted at all.
[0013] In addition, as described in the above-mentioned Non-Patent Document 1 or the above-mentioned Patent Documents 1 to 3, by adopting a structure in which the backli

Method used

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  • Liquid crystal display device and image display method thereof
  • Liquid crystal display device and image display method thereof
  • Liquid crystal display device and image display method thereof

Examples

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Example

[0067] The first embodiment

[0068] Hereinafter, referring to the drawings, the liquid crystal display device according to the first embodiment of the present invention and an image display method used in the device will be described. FIG. 1 is a block diagram showing the overall configuration of the liquid crystal display device according to the first embodiment of the present invention. In FIG. 1, the video signal displayed on the liquid crystal panel 34 in the liquid crystal module unit 30 described later is supplied to the maximum gray scale detection unit 11 and the frame memory 13 in the video signal processing unit 10. As described later, the backlight device 35 is divided into a plurality of regions, and the liquid crystal panel 34 is divided into a plurality of regions corresponding to each region of the backlight device 35. For each region of the liquid crystal panel 34, the brightness (light intensity) of the backlight ) Are controlled separately.

[0069] figure 2 I...

Example

[0123] Second embodiment

[0124] FIG. 21 is a block diagram showing the overall configuration of a liquid crystal display device according to a second embodiment of the present invention. In FIG. 21, the same parts as those in FIG. 1 are denoted by the same reference numerals, and their descriptions are appropriately omitted. In addition, in FIG. 21, the non-uniformization processing part 21 in FIG. 1 is omitted for simplification, but it may be a structure having the non-uniformization processing part 21 as in the first embodiment.

[0125] As described above, in the first embodiment, the light emission luminance Bo of the light that should be emitted by the light source 352 itself in the multiple areas of the backlight device 35 is obtained from the light emission luminance calculation unit 22, and the light sources 352 in the multiple areas emit light. The emission brightness Bo is the brightness value at the center point of each area. Figure 22 (A) means that only the backli...

Example

[0131] The third embodiment

[0132] FIG. 26 is a block diagram showing the overall configuration of a liquid crystal display device according to a third embodiment of the present invention. In FIG. 26, the same parts as those in FIG. 1 are denoted by the same reference numerals, and their descriptions are appropriately omitted. In addition, in FIG. 26, for simplification, the non-uniformization processing part 21 in FIG. 1 is omitted, but it may be a structure having the non-uniformization processing part 21 as in the first embodiment. In addition, FIG. 26 has the same light emission amount calculation unit 25 as in the second embodiment, but it may be a structure in which the light emission amount calculation unit 25 is eliminated.

[0133] FIG. 27(A) shows the case where the liquid crystal panel 34 is divided into regions 34a to 34d corresponding to the regions 35a to 35d of the backlight device 35A, showing that the grayscale of the regions 34a, 34b, and 34d is 0 (that is, bla...

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Abstract

A backlight device is divided into multiple regions, and has a configuration in which light emitted from a light source of each of the regions is allowed to leak to other regions. A maximum gradation detector detects a maximum gradation of a regional image signal displayed on each of the regions of the liquid crystal panel. An image gain calculator obtains a gain to be multiplied to each regional image signal. An emission luminance calculator obtains an emission luminance of light to be emitted by each light source, by using an operation expression according to the emission luminance of light to be emitted by the backlight device. At this time, if the emission luminance takes a negative value as a result of calculation, the emission luminance calculator makes a correction so that the emission luminance can take a value equal to or greater than 0.

Description

technical field [0001] The present invention relates to a liquid crystal display device having a backlight device, and an image display method for controlling the luminance of the backlight in the backlight device to display image signals. Background technique [0002] In a liquid crystal display device that displays images using a liquid crystal panel, since the liquid crystal panel itself does not emit light, a backlight device is provided, for example, on the back of the liquid crystal panel. The liquid crystal panel can be in an OFF state for blocking light and an ON state for transmitting light through a state where no voltage is applied and a state where voltage is applied. Therefore, by controlling the state of voltage application to a plurality of pixels provided on the liquid crystal panel, the plurality of pixels are driven as electronic shutters, and the amount of light emitted from the backlight passing through the liquid crystal panel is controlled to display im...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/34G09G3/20G02F1/133
Inventor 大岛芳则
Owner VICTOR CO OF JAPAN LTD
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